In a purpose built long range gun i would opt for a high bc heavy for caliber bullet. Distance is easy to dope, wind isnt so i will take every advantage i can there.
If forced to buy factory the ABM 230gr Berger OTM would top my list. Otherwise i would be calling Copper Creek about some Hornady ELD-X loads.
What length barrel? What twist? Factory magazine or aftermarket (i.e. badger, Atlasworx etc).
I just got a new LR rifle in 300 WM myself and so far have seen really good results with the 212 eld-x but i Have Badger bottom metal fed by A.I mags. I do not think this bullet will work in most factory magazines due to length though the 200 and 220gr options should work fine.
